Method parseReferentialAction

pkg/sql/parser/ddl_columns.go:311–339

parseReferentialAction parses a single referential action (CASCADE, SET NULL, etc.)

()

// parseReferentialAction parses a single referential action (CASCADE, SET NULL, etc.)
func (p *Parser) parseReferentialAction() string {
	if p.isType(models.TokenTypeCascade) {
		p.advance()
		return "CASCADE"
	}
	if p.isType(models.TokenTypeRestrict) {
		p.advance()
		return "RESTRICT"
	}
	if p.isType(models.TokenTypeSet) {
		p.advance() // Consume SET
		if p.isType(models.TokenTypeNull) {
			p.advance()
			return "SET NULL"
		}
		if p.isType(models.TokenTypeDefault) {
			p.advance()
			return "SET DEFAULT"
		}
	}
	if p.isTokenMatch("NO") {
		p.advance() // Consume NO
		if p.isTokenMatch("ACTION") {
			p.advance()
			return "NO ACTION"
		}
	}
	return ""
}

// parseTableConstraint parses a table constraint (PRIMARY KEY, FOREIGN KEY, UNIQUE, CHECK)
func (p *Parser) parseTableConstraint() (*ast.TableConstraint, error) {